Efficiency of certain insecticides against the small bean beetle, Bruchidius incarnatus (Boh.).

Document Type : Research and Review Papers

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The efficiency of five insecticides were evaluated against the small bean beetle, Bruchidius incarnates. Result indicated that the tested insecticides could be descendingly arranged according to their effeciency as follows: Malathion, Neemazal, Clove oil, K.Z. oil, and Agrien with LC50 values of 6.26, 100.00, 439.00, 618, and 1267 ppm, respectively. It is clear that malathion (organophosphoures pesticides) was the most toxic compound, whereas Agrien (biocide, (Bacillus thurengensis) was the least toxic one. Botanical pesticides and mineral oil occupied an intermediate position between with. Type formulation and concentrate of malathion play an important role in toxicity on adult stage of B. incarnates. Malathion 57% E.C. exhibited that highest activity compared with the malathion 5% D. and malathion 1% D. The LC50 values were 6.26, 13.3, and 45.8 ppm for Malathion 57% E.C., Malathion 5% D., and malathion 1% D., respectively. While the corresponding LC90 values were 34, 119 and 367 ppm, respectively. Obtained data indicated that the total residues in dry seeds of broad bean at all the different intervals from treatment were below the permissible limit (MRLs = 2 ppm).

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